we recently flew J on Qantas LAX-SYD. Upper deck was mostly full, except for last row next to the galley, so we booked Zone A in the nose (which flew half full). Lots of space in the nose, with that pedestal next to me for storage and nobody in the 2 center seats. In the middle of the night, I walked upstairs to see what the upper deck looked like (I've never flown there), and was surprised to see how small and claustrophobic it felt.